<html>
<body>
   <select name="numbers" id="numbers-options" onchange="selectOnChange(this)" multiple>
      <option value="zero">Zero</option>
      <option value="one">One</option>
      <option value="two">Two</option>
      <option value="three">Three</option>
      <option value="four">Four</option>
      <option value="five">Five</option>
   </select>
</body>
</html>